<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="minimum-scale=1.0, width=device-width, maximum-scale=1.0, user-scalable=no"/>
    <meta charset="utf-8">
    <title>Immutability</title>
    <script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
</head>
<body>
<h1>Immutability</h1>
<p>Open the console</p>
<script type="text/babel">

    let list = [
        { title: "Rad Red"},
        { title: "Lawn"},
        { title: "Party Pink"}
    ]

    var addColor = function(title, colors) {
      colors.push({ title: title })
      return colors
    }

    //
    // Add Color is mutating the original list
    //

    console.log(addColor("Glam Green", list).length)
    console.log(list.length)

</script>
</body>
</html>
